Piston-ring remover and applier



Dec. 6, 1927. E. G. MAKI PISTON RING REMOVEBYAND. APPLIER 1 Filed March5. 1927 4L /7 v I k 7 fig] ni I I k Inventor Amrngy Patented Dec. 6, g VUNITED STATES PATENT? OFFICE.

1 ma G." MAKI, or vIRGIN IA MINNESOTA.

I PISTON-RING nnmovnn AND Arrmnn.

a plicatio filed March 5,1927. Serial No. 173,066. I

The present invention relates to improvements in tools and has referencemore particularly to a tool for detaching and remov-' ing piston ringsfrom pistons.

One of the important ob ects of the resent invention is to provide atool the above mentioned character which will save 1 considerable timeand labor'in removing and 7 described.

applying piston packing ringsjthe tool being of such construction as topermit the same to be readily and easily placed over the piston tofacilitate the removal of the packing rings the-refrom.'

A further object is to providea tool of the above mentio'nedcharacterwhich is simple in construction,"strongand durable, and

furthenwelladapt'ed to thepurpose for which it is designated;

Other objects and advantages of the invention will become apparentduring the course of the following detailed description.

Inthe accompanying-drawing, forming'a part-of this application, and'inwhich like reference characters designate like parts throughouttheviews:

Figure 1 is a' top plan, 'View of the tool, embodyingmyinvention. p y

V Figure 2 is a front edge elevation.

' Figure 3 is a sectional view, taken approximately on the line 3-3ofFigure 1. I a

In the drawing, wherein for the purpose of illustration is shown thepreferred embodiment of my invention, the numeral 1 designates generallymy improved piston ring tool, the ame comprising a head 2, the.

forward end portion beingenlargedand the inner face being concaved, asillustrated at 3, for a purpose hereinafter to bemorefully Also forminga part of the present invention is a relatively large annular memberformed ofspring metal, the, samebeing constructed in such a manner as toprovide a plurality of segmental sections. Three ofsuch sections arepreferably formed, the same consisting of-a relatively shortinter--mediate-section-4 and the larger end sections '5 and 6 respectively.The intermediate section of the segmental annular member is riveted tothe concaved inner facel3 'of-the head 2, as illustrated at 7,, withreference more articularly to Figure 1- of-theldraw- -1I1g.

his intermediate section 4 is "of substantially the same length asthelength-of the concaved inner-face oredge 3 of the head2.

The inner end ofthe segmental section 5 1s hingedly secured to the innerend portion ofthe head 2, as at 8, while the innerend of the otherend'section 6 is hingedly secured to the opposite-inner'end portion ofthe head '2 as at 9. a In this manner, the end sections respectively,and the purpose thereof will also be presently described. The head 2 isformed with an enlarged "transversely. extending'slot 12, and inregistration with this slot is a similar slot 13 formed in theintermediate portion of the intermediate section 4 of the segmentalannular member. Adapted for disposition within the slot 12 formed in thehead'2 are the inner ends'of a pair of levers 14 and 15, the leversbeing pivotally connected together, by means of avertically extendingpivot pin 16, which is carried by the head 2, and the particularmannerin which these levers are connected together, with respect to the headis clearly shown in Figure 1.

' A pair of co-acting jaws 17 and 18 are formed on the pivoted ends ofthe levers, and these jaws are disposed through the slot 13 formed inthe intermediate section 4 of the packing rings are segmental annularmember, so that the free ends of the jaws extend into the spacesurrounded by theannular member. These j aws' taper gradually towardtheir outer free ends and as is clearlyshown-in Figure 2, the jaws "arenot disposed in the same horizontal plane, one jaw being disposed abovethe other jaw, in order that the same may prop- -erly engage theasplitend of the piston packing ring which is seated in the groove pro videdtherefor, in the piston, in the manner well known in the art. These jawsare adapted to be moved in opposite directions, and are normallyretained in a closed position, through the medium of the leaf spring 19,which is interposed between the pivoted levers or handles Hand 15. Theslot 12 is of such'size as to permit the pivoted portions of thecoacting levers to be free to -move therein, and thesame is true withrespect to ,the slot 13, formed in the intermediate-memher 4 of thesegniental annular member, in order to permit the proper and freemovement of the co-acting jaws l7 and 1S.

i\s1';oeiatcd with the annular member is a means tor SUPPOItlHg the exmnded piston ring and the same comprises the provision of pairs oflaterally extending ears or lugs 20 and E21 respectively, which lugs orcars are formed on the upper and lower edges of the sections of thesegmental annular member at spared inter ale in the manner asclearlyivshown inlligrures l. and 3. These laterally extending ears orlugs are disposed inwardly trout the several segmental sections andextend into the pace surrounded by the annular member, as clearlyillustrated in Figure l.

The use of my improved piston ring tool may be hrielly stated asfollows:

in retrieving a piston pat-hing ring from a piston, the segmentalsections 5 and 6 are swung outwardly on their pivots S and 9 resiwctivcly, so that the toolmay be placed around the piston, and when theannular member-is disposed adjacent the ring which is to be emoved fromthe piston, the handles 10 and 11 formed 'atlhe outer clree ends of thesections 5 and 6 are grasped, and the pointed ends of the coacting jaws1.? and 18 are disguised between the split end of the parking; ring.Pncssure, is then applied to the levers orhandles let and 15,,so thatwhen tholevers are moved inwardly toward each other, the jaws will moveoutwardly, consequently spreading or expanding the pisston packingring,and sinnilltaneously causing the packing ring to move outwardly trom itsgroove in the piston, against the inner face of the segmental annularmemher and between the ecu-acting upper and lower laterally extendingears or lugs 20 and .21. v r f \Vith the piston ring maintained in itsexpanded pliisition, due to the holding of the let ers ll and 15, in aclosed position, the

lugs E20 and 21 will support the ring on the annular member and permitthe tool to be moved upwardly, on the piston. so as to enable the someto be disengaged from the upper end thereof and in this manner thepiston ring will be removed in a simple and eltieient manner. v The sameoperation takes place in inserting a piston packing ring on a piston, as

will he readily obvious from the construction and use of the toolsherein shownand above described. i

It will thus be seen from the foregoing description that I have provideda tool for removing and inserting piston packing rings, which will saveconsiderable time and labor, and which will furthermore, be of suchconstruetion as to enable the same to be readily and easilyapplied on apiston. Thesimplicity of my improved tool enables the same to bemanufactured at a ver 7 low cost, and the same will, at all times, epositive and eiticient in carrying out, the purposes for which it isdesigned.

While I have shown the preferred embodiment cl? my invention, it to beunderstood that various changes in the size, shape and arrangement oilparts may he resorted to, without departing from the spirit of theinvention or the scope of the appended claims.

\Vhat claimed is: i

l. A tool 01'? the class described comprising a head member, a splitannular member secured to the inner end of the head member, each out thefree ends of the annular member being disposed (inwardly to provide apair o't normally spaced handles, whereby the annular member-may beclosed around a paston, a pair of oppositely movable co-acting jawscarried by the head and projecting into the space surrounded by theannular memher for engagement wit/1 the free ends of a piston rinq, toexpand the same against the inner face of the annular member.

A tool oi the class described conipris ber, and means for supporting theexpanded piston ring on the annular member.

3. A tool of the class described comprising a headmember, the inner facethereof being coneaved, a segmental annular member adapted to encircle apiston, the some comprising an intermediate section rigidly secured tothe concaved face of the head member, a pair of end sections hingedlysecured at their inner endsto the inner end portions of the head member,the free ends of the end sections being disposed outwardly to provide apair of normally spaced handies, a pair of oppositely movable co-acting1aws carried by the head member and projecting through the intermediateportion of the segmental annular member into the space surrounded by thesaid annular member, the free ends of the jaws adapted for engagementwith the split ends of a piston packing ring for expanding the some, andmeans for supporting the expanded piston ring on the annular member. i

4.. A tool of, the class described comprising a head member, the innerface thereof be ing concaved, 11 segments] annular member adapted toencircle a piston, the same coinprismg an intermediate sectionrigidlyseiso cured to the concaved face of the head memcarried by thehead member and projecting 1 ment with the split ends of a pistonpacking.

through the intermediate portion of the segmental annular member intothe space surrounded by the said annular member, the free ends of thejaws adapted for engageringfor expanding the same, and means forsupporting the expanded piston ring on the annular member, said lastmentioned means comprising a series of cooperating lugs ex: tendinginwardly from the upper and lower edges of each of the segmentalsections of the annular member.

5. A tool of the class described comprising a head member, a pair ofpiston encircling sections hingedly'secured attheir inner ends to therespective ends of the head member, the free ends of said sections'beingdisposed outwardly to provide a pairof normally spacedhandleswhereby thesections may be closed around a piston, a pair of coacting leverspivotally carried by the head,

jaws formed on the pivoted ends of the levers and extending into thespace surround- .ed by the hinged sections for engagement with the freeends of thesplit piston ring to expand the same against said sections.

" 6. A tool of the class described compris ing a split annular memberadapted to en-.

circle a piston, the same comprising an intermediate section, a pair ofend sections hingedly secured at their innerends to the respective endsof the intermediate section, the

free ends of the end sections being disposed outwardly to provide a pairof normally surrounded by the annular, member for engagement with thefree ends of the split piston ring to. expand the same.

7 In testimony whereof I aflix my signature.

ELMER G. MAKI.

